naa a22 4500 510815650 CHVBK 20180411083506.0 cr unu---uuuuu 180411e20131201xx s 000 0 eng 10.1134/S0031918X13130036 doi (NATIONALLICENCE)springer-10.1134/S0031918X13130036 Phase and structural transformations in U and U-Nb alloy upon severe deformation and heat treatments [Elektronische Daten] [Yu. Zuev, V. Sagaradze, N. Pecherkina, I. Kabanova, I. Svyatov, S. Bondarchuk, D. Belyaev] Transmission electron microscopy was used to analyze the twin and dislocation structure of samples of commercial uranium in the initial (undeformed) state and after severe deformation using explosive loading by plane and spherical waves of various intensity. It has been shown that an increase in the intensity of explosive loading by a plane wave leads, first, to an increase in the density of randomly distributed dislocations and twins and, then, to the development of polygonization processes with the formation of a subgrain structure of the α phase. Crystallographic analysis of the initial and deformation-induced twins in uranium has shown the presence of predominantly {130} twins of mixed type and, in singular cases, {172} and {176} twins of the second kind. It has been established that the retained spherical shells have a distinctly pronounced zonal structure, which contains information on the forward and reverse martensitic phase transformations of uranium (α ↔ β(γ) ↔ L, etc.) that occur under shock-wave loading by spherical waves. Conditions are determined for the manifestation of structural heredity in the U-6 wt % Nb alloy with recovery of the size and shape of grains of the initial high-temperature γ phase during the forward γ → α″ martensitic transformation upon cooling and during reverse α″ → γ transformation upon heating. Elimination of the structural heredity with significant grain refinement of the high-temperature γ phase occurs in the process of repeated quenching from 700°C after one type of preliminary treatments (cold deformation of α″ martensite, recrystallization of the deformed α″ phase, high-temperature aging of the initial α″ martensite, and eutectoid decomposition). Pleiades Publishing, Ltd., 2013 uranium nationallicence U-Nb alloy nationallicence shock-wave loading nationallicence deformation nationallicence martensite transformation nationallicence grain refinement nationallicence twinning nationallicence structure heredity nationallicence Zuev Yu All-Russia Research Institute of Technical Physics, Russian Federal Nuclear Center, Snezhinsk, Russia aut Sagaradze V. Institute of Metal Physics, Ural Branch, Russian Academy of Sciences, ul. S. Kovalevskoi 18, 620990, Ekaterinburg, Russia aut Pecherkina N. Institute of Metal Physics, Ural Branch, Russian Academy of Sciences, ul. S. Kovalevskoi 18, 620990, Ekaterinburg, Russia aut Kabanova I. Institute of Metal Physics, Ural Branch, Russian Academy of Sciences, ul. S. Kovalevskoi 18, 620990, Ekaterinburg, Russia aut Svyatov I. All-Russia Research Institute of Technical Physics, Russian Federal Nuclear Center, Snezhinsk, Russia aut Bondarchuk S. All-Russia Research Institute of Technical Physics, Russian Federal Nuclear Center, Snezhinsk, Russia aut Belyaev D. All-Russia Research Institute of Technical Physics, Russian Federal Nuclear Center, Snezhinsk, Russia aut The Physics of Metals and Metallography Springer US; http://www.springer-ny.com 114/13(2013-12-01), 1123-1154 0031-918X 114:13<1123 2013 114 11508 https://doi.org/10.1134/S0031918X13130036 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1134/S0031918X13130036 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Zuev Yu All-Russia Research Institute of Technical Physics, Russian Federal Nuclear Center, Snezhinsk, Russia aut NATIONALLICENCE 700 1- Sagaradze V. Institute of Metal Physics, Ural Branch, Russian Academy of Sciences, ul. S. Kovalevskoi 18, 620990, Ekaterinburg, Russia aut NATIONALLICENCE 700 1- Pecherkina N. Institute of Metal Physics, Ural Branch, Russian Academy of Sciences, ul. S. Kovalevskoi 18, 620990, Ekaterinburg, Russia aut NATIONALLICENCE 700 1- Kabanova I. Institute of Metal Physics, Ural Branch, Russian Academy of Sciences, ul. S. Kovalevskoi 18, 620990, Ekaterinburg, Russia aut NATIONALLICENCE 700 1- Svyatov I. All-Russia Research Institute of Technical Physics, Russian Federal Nuclear Center, Snezhinsk, Russia aut NATIONALLICENCE 700 1- Bondarchuk S. All-Russia Research Institute of Technical Physics, Russian Federal Nuclear Center, Snezhinsk, Russia aut NATIONALLICENCE 700 1- Belyaev D. All-Russia Research Institute of Technical Physics, Russian Federal Nuclear Center, Snezhinsk, Russia aut NATIONALLICENCE 773 0- The Physics of Metals and Metallography Springer US; http://www.springer-ny.com 114/13(2013-12-01), 1123-1154 0031-918X 114:13<1123 2013 114 11508 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer